Carbureter for combustion-engines.



Re E, KRAUSE. GARBURETER FOR GOMBUSTIONENGINES.

APPLICATION FILED APB. 6,'41 908.

Patented Feb 2 SHEETS-SHEET 1.

f .Rg E. KRAUSB..

CARBURETBE FOR G OMBUSTI'ON ENGINES. APPLIUATION FILED APB. 6,1908.

948,612. Patented Feb.l8,191o.

mlnesscm- UNITED STATES rATENT onuiou.

RICHARD E. KRAUSE, OF CLEVELAND, OHIO, ASSIGNOR TO THE KRAUSE CARBUBETER COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

CARBUEETER FOR COMBUSTION-ENGINES Specification of Letters Patent.

Patented Feb. s, 1910.

Appneatien ined April 6,' 190s. serial No. 425,383.

-To all 'whom it may concern:

Be it known that I, RICHARD E. Knxusn, a subject of the King of Sweden, residing at Cleveland, in the county of Cuyahoga and State of Ohio, Vhave invented certain new and useful Improvements in Carbureters for Combustion-Engines; and I hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in the art to which it pertains to make and use the same. l

This invention relates to improvements in what are known in the art as multiple-jet,

carbureters for combustion engines.

One object of this invention is to constructan exceedingly simple and reliable carbureter in which the air and gasolene or hydrocarbon of the combustible mixture to be fed to the engine are commingled in the proper proportion for attaining perfect combustion without any auxiliary compensating valves, and supplied to the engine in the required quantity and in the said proportion during any speed or load of the engine.

Another object is to construct a carburetor' of the character indicated which comprises a valve controlling communication through a multitude of duets t0 which air and gasolene or liquid. fuel is supplied and which are arranged to discharge into a'mixing chamber in common which has an outlet employed to feed the combustible mixture from Another object is not only to supply such a quantity of fuel to each duct relative to the supply of air to the said duct that the proportion of fuel and air supplied toeach duct sha1-l substantially correspond with the relative proportion of fuel and air supplied to anyone or any number of the other ducts during the passage of fluid through the said ducts in the operation of the carbureter so as to insure the proper mixture of gasolene or hydrocarbon and a-ir for any speed or load of the engine in connection with which the carburetor is used, but to regulate or control the flow of fuel through all the fuel-feeding nozzles uniformly and simultaneously.

Another object is to provide a valve for regulating the supply of the combustible mixture from the mixing chamber through the outlet of the Said chamber, and to have the said valve and the aforesaid valve employed in controllii'ig the supply of air and liquid fuel to the mixing chamber operated simultaneously and so relatively arranged that the suction created within the mixing chamber is increased or decreased simultaneously with an increase or decrease in the supply of air and liquid fuel to the mixing chamber until the said Valve for controlling the suction or partial vacuum within the mixing chamber is fully open so that the suction or partial vacuum created in the mixing chamber during the operation of the engine is properly governed.

Another object is to provide such a number of the said ducts and such an arrangement of the ducts and valve controlling the passage of fluid from the said ducts into the .mixing chamber relative to the opera tion of the suction-governing valve that when the latter fully open all of the said ducts shall not yet have been uncovered so that additional air and liquid fuel may be supplied to the mixing chamber as required for the maximum Speed of the engine carrying a normal load and thereby enable the maintenance of a suitable vacuum in the mixing chamber when' the engine is overloaded as is generally the case in automobiles going up hill.

Another object is to construct a carburetor of the character indicated in which the supply of liquid fuel to the fuel-discharging nozzles of the carbureter is controlled by a eatures of construction',v and 'combi- A nations of parts, hereinafter'described, point- A accompanying drawi gs.

' ed`outin the claims, and illustrated the In the said drawings, Figure 1` is afvertical central section of a carbureter embodying my invention. Fig. 2 is a horizontal section on line 2-2, Fig. 1 looking downwardly. Fig. 3 is a horizontal section corresponding with Fig. 2, except that in Fig. 3 the valve employed in controlling communication through the outlet of the mixing chamber is shown fully open, whereas in' Fig. 2 the said valve is only shown slightly open. Port-ions are broken away in Fig. '3 to reduce the size of the figure. Figs. 4, and G are horizontal sections on lines 1r-4, 5 5, and 6-6, respectively, Fig. 1, looking downwardly.

My improved carbureter preferably comprises a cylindrical vertically arranged metal shell A which is provided internally and be'- tween its ends, but preferably a short distance below the upper end of the shell, with a partition a which is arranged horizontally `or transversely of the shell and separates the space 10 and the chamber 12 which are formed respectively next above and next below the said partition within the upper end anllower portion respectively of the said she chamber 12. The float F is provided at its upper end with an upwardly projecting vertically arranged stem f. The float may be made of cork or in any other approved inanner. The f loatcontaining chamber 12 is closed at its lower end by a head which is suitably attached to the lower end of the f shell A. A short distance below the head B and in suitable proximity to the central p ortion of the head (see Fig. 1)' is arranged an upright annular shell b which forms the surrounding wall of a chamber 16 arranged to receive gasolene or other liquid rfuel supplied to the said chamber through a screen 17 which extends transversely of the lower end. of the chamber and is'held, against the un-4 C indicates the pipe for supplying gaso` lene or other li uid fuel to the carbureter and extends through the head D and communicates at its discharging end with the chamber 20. The shell I) is screw-threaded internally at its upper end and screwed lonto the externally screw-threaded lowerend of an upright valve-casing E which is screw- A 'oat F is contained within the threadedv externally at its upper eiidffand" screwed'into a correspondin ly threadedgapsj' through th'ej head .erture extending vertically B. The valve-casing E is prvidedlinteriorl with a passagewa 27 which; extends longitudinally of the v a Ve-casing andis in communication through orifices 28g formed 'in the valve-casing withthe chamber IGf-and-j consequently 'in-communication with the-l 1 'uid-fuel-sup-ply pipe C. l.Thepassageway217 75", connects at the upper end of the valve-casing E with and'forms-the fuel-inlet of. the 'float-HfA containing chamber. 12.

A valve K- is arranged 'within'the passageway 27 and adapted to control, communication through the said passageway. -The valve K is conical'and movable verticallyy within the passageway 27 and in its upper and closed osition engages a valve-seat 30` with which the valve-casing El is4 rovided internall The valve K is 'provided withaI de endi ng stem 32 which extends downward y into and has lateral .bearing within an externally screw-threaded bushino 33 which is screwed into the lower end oki with a vertically upward y projecting stein :35'wliich is arranged centrally of andsex# tends through the upper end of the passagway 27 and a suitable distance-upwardly into the float-containing chamber.' The valvestein 35 has its upper end engaging the under side of a lever M. The lever'M is provided at one side and a-suitable distance -from the valve-stem 35 with -an upwardly projectinglug or member m "which engages lever (see Figs. -1`and 6) is horizontally the under side of the float F, and the said pivoted or fulcrumed, as at 11 at the opposite sideof the said valve-stem to a bracket L 'which is forked, at its outer end, as at Z, to accommodate the engagement of the said bracket with an annular recess 34 which is formed in and extends circumferentially of the upper end-portion of' a vertically arranged screw I ,which is arranged between the fulcrum of the lever and the outer ex- Vtremity of the fork'edend-portion of the bracket and nearer the last-mentioned extremity than to 'the said fulci'unL The scr'ew I engages land extends through a correspondinglyarran ed and correspondingly screwtlireaded ho e 2G formed in the head B, and

va nut J is mounted on the said sciew at the under sideof the said head and secures the screw in the desired adjustment. It will be observed that 'the forked end Z of the leverbearing bracket L loosely fits the recess 34 and that the said bracket is supported from the screw without interfering with the turning of the screw independently ofthe bracket. To positively prevent turning of the bracket L with the screw during any turning and consequent. readjustment of the screw the head B is provided between the screw and the fulcrum L of the lever M with an upwardly project-ing pin or member 24 which'engages a hole 25 formed in the said bracket.

InFig. l of the drawings 15 indicates the liquid-level required to be maintained within the float-containing chamber, and the a1'- rangement of the parts is such that the valve K isV closed by the spring-.; when the said liquidlevel obtains within the said chamber. Obviously however as soon as'the said liquidlevel falls the float. F lowers by gravity and thereby7 actuates the lever M in the direction required to effect the depression of the Valvestem so as to openthe valve K against the action of the spring and permit additional liquid fuel to pass into the float-containing chamber at the fuel-inlet of the said chamber until the required liquid-level in the said chamber is restablished. 'Itwill be observed also that the lever M constitutes float-operated means employed in opening the valve K which controls the .supply of liquid fuel to the Heat-containing chamber through the fuel-inlet of the said chamber, and that the fulcrumed end of the said lever M, being supported from the 'vertically adjustable screw I through the medium of the bracket L, is adjustable verticallyfrom the exterior' of the carbureter. Obviously to effect the establishment of the required liquidlevel within the Heat-containing chamber preparatory to t-he operation of the carburetor it is only necessary to loosen the nut .l and thereupon manipulate the screw I to properly adjust the lever-bearing bracket L vertically7 and the said bracket is secured in the desired Vertical adjustment by tightening the nut. Obviously therefore in my improved carburetcr the liquid-level within the float-containing chamber is adjustable from the exterior of the carbureter during the running of the engine.

An inverted cup-shaped member P is'arranged above and centrally of the space 10 and provided at its lower end and externally with an annular flange 7; which rests upon and is suitably secured to the upper end of the shell A. The member l forms an upl ward extension of the space l0, and the space 10 and its upward extension or enlargement by thc said member` P forms a mixing chamber in which air and gasolene or other liquid fuel commingle to form the combustible luixture which is to be supplied to the cylinder of the engine in connection with which my improved carburetor is to be used.

A tubular or hollow shaft R is arranged centrally of the mixing chamber and extends vertically upwardly from the lower end of the .said chamber through the chamber and a suitable. distance above the chamber. The shaft R is operatively*provided atA its lower end with a flat rotary valve f1 which seated on the bottom of the mixing chamber, which bottom is formed by the partition a.

The shell A is considerably increased in thickness at one side of the'float-containing chamber-'l2 to accommodate the formation in the 'said thicker portion of the surrounding wall of the float-containing chamber of a multitude of upright ducts 50 which are arranged therefore at one side and externally of the said cliailibeiaiid spaced circumferentially of the said chamber and equidistantly from the shaft RS Each duct 5() extends downwardly from the bottom of the mixing chamber and at its lower end is provided with a lateral air-inlet 49 which is continually in communication with the external atmosphere. The bottom of each duct 50 is provided with a screw-threaded hole 52 which extends vertically through the said bott-om, and a corresponding exter-y nally screw-threaded nozzle Q is screwed into the said bottom at .thel said hole and projects vertically upwardly into the said duct and discharges at its upper end into the duct preferably at a-.point opposite the central portion of the inner end of another lateral air-let 48 withwhich the said duct is provided at its outer side and above the air-inlet' 4:9 of the duct.' Each nozzle therefore establishes communication between the duct into which it discharges and the ioat-eontaining chamber. Each nozzle (see Fig. l) preferably has a cup-shapcd upper end '-16 which is provided in its bottom and centrally with an upwardly discharging oriiice et? which is the outlet of the passageway 45 formed in the nozzle and communicating at the lowerend of the nozzle with the floatcontaining chamber, and preferably the relative arangement of the parts is such that the cup-shaped upper end ot' each nozzle has its upperextremity above the liquid-level required to be maintained inl the float-containing chamber and has its bottom below the said liquid-level so that during theopera-l tion, of the carburetcra small quantity of liquid fuel is always present in'the cup'- shaped upper end of the nozzle.

The shell A is provided at the outerends of the upper air-inlets 11S of the duets (see Figs. l and 5) with an annular recess 42 which extends circumferentially of the' shell and is engaged by a valve-forming ring 43 which is seated on the bottom of the said re cess and is shiftable 4circumfcrentially of the said shell. The ring or valve 43 is provided with as many lateral ports tt as there are ducts 50` which ports are continually in communication with the external atmospherc, and the relative arrangement of the parts is such that when the said valve is open its ports 44- register with theair-inlets les , 48 of the said ducts, and imperforate por.-

50 correspond in dimensions and fluid-com tions of the valve cover the said airinlets 48 when'the valveis closed. It will be observed therefore that my improved carbureter is provided with a..valve for siniultaneously regulating orcontrolling the supply o'f air to all of the ducts 50 at the upper air-inlets 48 of the said ducts. The ducts ducting capacity. The lower air-inlets 49 of the ducts correspond vin dimensions and air-supplying capacity. The upper airinlets 48 of the ducts correspond iii dimension's and air-conducting capacity.l The maintaining a suitable vacuum around the discharging ends of the nozzles, during the operation of 'the carbureter. The valve.- forming ring 43 (see Fig. 5) is preferably made -in halves or sections suitably secured -together by screws Y3G' which engage correspondingly' threaded holes formed inlugs 37- with which adjacent ends of the-said sections are provided. The arrangement of the parts and the dimensions of the value1', as illustrated, are such that the said valve is adapted to cover` all save one of the ducts 50 in the fully closed position of the valve. The valve r uncovers the valve-covered 4ducts successively in actuating the valve from-its fully closed into its fully -open position. The valve 'r therefore controls communication with the mixing chamber throughl a multitude of ducts 50.

The valve-operating shaft R has lateral bearing within a box 53 depending from the top wall of the mixing chamber.l The shaft R is provided at the lower end of the box 53 with a collar 54 which coperates with the said end of the box in limiting the upward movement. of the shaft, but the collar 54, when the valve r is in position resting upon the bottom a. of the mixing chamber, is spaced somewhat from the lowervend of the said box, as at s, to afford a limited playvertically to thevalve r. The collar 54 is preferably secured to the shaft R by a setscrew w to render the collar adjustable endwise of the "shaft and thereby permit an accurate spacing of the collar relative to the lower end of the box 53 and-also to render the collar and connected valve adjustablel circunifereiitially of the shaft into the desired position relative to the outlet o of the mixing chamber. The valve 7' seats by gravity in the absence of enough suction or partial vacuum in the mixing chamberto lift the .valve from its seat, but the limited vided with a Valve-forming se up hill.

play vertically' afforded to the'. valve 'as here-Y inbefore describedrpermits the'iaising of thel valve by the requisite suction created within i the-mixing chamber, and the great im;

portanceof this vertical play of theyalve is evident because itfenables'the suction created within the mixing-chamber during the operation of the engine to raise the valve enou li to permit the passa e of'some air and thereby eifeetually avoid any jerking of the 'engine'v during the actuation of the valve to successively uncover the said ducts.

Preferably a bushing' 55 is arranged Within the valve-operating shaft R and loosely surrounds the float-stem f, which bushingis externally screw-threaded at its lower endv and screwed Ainto the partition a. i

The shaft R is operatively provided at its upper end externally of the' mixing chamber with a spur-gear t, and a diametrically larger spur-gear T meshes with the gear t and is sultably supported from'a lug 57 with which the inverted-cup-shaped member P is externally provided. The gear T is provided with a lever4 56 for turning the Sallie.

The outlet o ofthe 'mixing chamber is..l

shown formed at one side of the transversely smaller upper portion of the said chamber opposite the collar 54 `whichis proent 58 which is arranged conceiitrically o the shaft R and has the arrangement and dimensions required to interru t communication through the outlet of the mixing chamber. In Fig. 2 the valve'58 is shown slightly open, and the arrangement of;4 the parts is preferably such that when theiivalve 58 is slightly open as illustrated iuFig.

2 the valve r'is in its fully closed position in which the said valve 1', as already indicated', covers all but one of the ducts 50. The relative arrangement of the parts is preferably furthermore such that in the fully open position of the valve 5S, as shown in Fig. 3, the valve r has uncovered all but one and a half of the ducts adapted to be covered thereby at one time so that when the valve 58 is fully opened all the ducts-50 shall not yet have been uncovered so that additional air and liquid fuel may be supplied to the mixing chamber as required for themaximum speed of the engine carrying a 4normal load and thereby maintain a suitable vacuum in the mixing chamber when thev engine is overloaded as is generally the case in automobiles -going The Valve 58 regulates the supply of combustible mixture from the `mixing chamber through the outlet of the said chamber, and the said Valve and the valve 1- 'eniployed in controlling the supply of air and liquid fuel to the mixing chamber are operated simultaneously and so relatively',r

@that the suction -or Awithin themixing c amber during the op y 1 0 eration of theengine is properly governed.

arranged that the suctioncreated within creased .simultaneously with anv increase 'or decrease in the supply of air andliquid fuel to, the mixing chamberuntilthe' said valve 'orfcontrolling the suction or partial vacuum Y within the mixingchamberA is' fully open so artial' vacuum 4created' By the construction and relative arrange-v ment ofV parts hereinbefore described, it will,

Abe observed that my' ir n `provedl carbureter comprises a float-containingxchamber from. ..15'

which a multitude of nozzles supply the fuel to air-receiving ducts arrange outside of the said'chamber and corresponding-in number with the nozzles, which ducts respec` tively communicate "at one endwith the external atmosphere and the other end connect separately with a mixing chamber -in common, which chamber has an outlet controlled by an `adjustable valve simultaneously -with the f'oritrolb'y a valve of-the discharge from the "said-"ducts into the mixing chamber for e inixing chamber.

the purlpoSe-'of maintaining a suitable -vacu- 1. In a carbureter for a combustion enine, a mixing chamber having an outlet or feeding a combustible mixture to the eny A chamber, which ducts are provided with air.

85 inlets continually communicating with the'- gine; several air-receivingducts connecting and adapted to communicate with .the said external atmosphere and have other air-n- ,lets; means whereby the supply of air to the ducts through the last-mentioned air-inlets is controlled or regulated a suitably operatedvalve covering the dischargingends of at least a plurality of the said ducts in its fully closed position and arranged to successively uncover the valve-covered ducts in actua-ting the valve from its fully closed into its fully open position, and means for supplying Huid fuel to the ducts.

` 2. Ina carbureter for a combustion en- '50 adapted-to communicate'with the said cham# ine, a mixing chamberhaving an outlet for ceding al combustible mlxture tothe engine; several air-receivin ducts connecting and ber, which ducts 'are each provided' with an air-inlet continually communicating with.

the -external atmosphere and have another valve-controlled air-inlet; a valve for-controlling or regulating the supply of air to each duct through the second-mentioned airinlet of the said duct; a suitably operated valve covering the discharging ends of at least a plurality of the said ducts in its fully 1n fuIly open position, 'and means. for

`closed position and arranged to successively uncover the valvecovered ducts in actuatthe valvefrom its fully closed into its airlr ing-the luidfuel to the ducts. "ff/ffl' 3. In' a. ,carbureter for a combustionenvided with a -fuel-inlet suitably contro ed;4 a mixing chamber arranged-- above and 'eXter'- nally. .o .the jfloat-containing chamber and' provided with an outlet for feeding a combustible mixtureto -tlie""eri'} 3;ine; upright ducts formed externally and spaced circumferentially of .the vfloat-containing chamber, which ducts. connect and are adapted. to

communicate with the mixing chamber and 'provided with two vertically spaced lateral air-inlets the lower of which is continually.

incommun-ication with theexteinal atmosphere; means'whereby the supply of air to sirthe ducts through thejnp'per air-inlets of all of the ducts may be regulatedandliquidfiiel-conducting nozzles communicating with the first-mentioned chamber and discharging into the ducts opposite theupper air/ inlets of the ducts.

4. In a carbureter'for a combustionjenginef a liquid-fuel-receiving chamber provided with a suitablycontrolled fuel-inlet; a mixing -chamber arranged above and externally of the float-containing chamber, said -inixing chamber being provided-A with -an ,outlet for feeding a combustible mixture to extending circumferentially of the floatcontaining chamber and arranged to .regu late the supply ofair to all of -the ducts simultaneously through the upper air-inlets of the ducts; liquid fuel conducting nozzles arranged centrally of the lower portions of the lducts and communicating at their lower.

ends with the first-mentioned chamber, which nozzles discharge upwardly into thel ducts opposite the upper air-inletsl of the ducts..

In'testimony whereof, I sign the foregoing specification, in the presence of two'witnesses.

Witnesses:

' C; H.- Donna,

Vieron C. LYNCH.

lio

:RICHARD E. Knapen 

